Second turbo only producing .4 bar

[bobapple]

Afternoon everyone, got a little problem I noticed a few weeks back I did a pull and thought it didn't pull as hard as usual, did a second pull and felt OK, took it out for a run today and now my second turbo doesn't pull over .4 bar on every run, could this be split or perished vac pipes or something else like a valve or something, I have noticed a couple of my vac pipes aren't in great condition.

Hope someone can shed some light

Thanks for reading

Si

 

Forgot to say first turbo makes full boost cheers

Edited May 8, 2016 by bobapple (see edit history)

[mellonman]

Sounds like you have problem 2 in this thread http://www.mkivsupra.net/vbb/showthread.php?35926-The-sequential-system

But alot of the time problems like thiscare vac pipes I would replace everyone if it was me

[bobapple]

Thanks for the link mate, think it's a vac pipe, found one with a split in managed to bodge it with some tape and managed to get full boost so gonna get some new vac pipes ordered tomorrow, thanks again .

[Chris Wilson]

Get rubber ones, not that blue silicone *#~%

[bobapple]

Hi Chris am just gonna get some oem ones either from Keron or Toyota

[adam1983]

Was going to replace all of mine too. Can these be bought as a set from Toyota or do they have individual part numbers?

Also are there any diagrams out there with all of the vacuum pipes labelled?

[Chris Wilson]

Many can be replaced with the likes of gates rubber hose off a reel. the more tightly moulded shaped hoses really need buying from Toyota. Last time I bought some they were available, but Supra MKIV parts are slowly falling of the radar. They are mainly individual numbers, some are shown as cut lengths from the reel.